2006年北京春季氣溶膠吸收系的分離研究

A statistic regression approach was used to estimate the wavelength exponents of black carbon(BC)and dust particles,and further to separate the contributions of the two types of aerosols to the total light absorption coefficient measured in the Beijing urban area in the spring of 2006.The results show that the wavelength exponent(α)of black carbon aerosol at urban site was approximately-0.92.which is in agreement with the value of-0.8±0.2 reported in related studies.The decoupling analysis of the measured light absorption coefficients during the three floating dust periods(March 25,March 27,and April 9)demonstrates that,on average,the light absorption caused by dust particles took up about 32.8% of the total light absorption at 520 nm wavelength,and by black aerosol more than 60%.This indicates that the black carbon was still the major contributor to the total aerosol light absorption in Beijing urban area even during the floating dust periods.

作 者： 潘小樂 顏鵬 湯潔 Pan Xiaole Yan Peng Tang Jie   作者單位： Chinese Academy of Meteorological Sciences,Beijing 100081,China  刊 名： 氣候變化研究進展  ISTIC 英文刊名： ADVANCES IN CLIMATE CHANGE RESEARCH  年，卷(期)： 2008 4(z1)  分類號： P4  關鍵詞： dust particle   black carbon   absorption coefficient   wavelength exponent  

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